/**
 * Copyright 2010 Creative Works, Inc.
 * Creative Works licenses this file to you under the Apache License, version
 * 2.0 (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *    http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
package org.teksme.server.common.validator;

/**
 * A chain of specific tests to detect problems in the request or the data.
 */
public interface ScreeningChain
{
  /**
   * Adds the diagnostic to the chain.
   */
  void add(Screening diagnostic);

  /**
   * Adds the {@link Screening#getChildren children} of the diagnostic to the chain.
   */
  void addAll(Screening diagnostic);

  /**
   * If the diagnostic has {@link Screening#getChildren children}, 
   * {@link #addAll add}s those children,
   * otherwise, {@link #add add}s the diagnostic. 
   */
  void merge(Screening diagnostic);
  
}

